Description:
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The documentation for filter_var (http://php.net/manual/en/function.filter-var.php) implies that array's are filtered recursively:

"Value to filter, arrays are filtered recursively."

However passing any array returns false

Reproduce code:
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var_dump(filter_var_array(array('foo', array('bar')), FILTER_UNSAFE_RAW));

Expected result:
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array
  0 => string 'foo' (length=3)
  1 => 
    array
      0 => string 'bar' (length=3)


Actual result:
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false